Lighting device



FIG. 1 is a left side view of a first embodiment of a lighting device in accordance with our new design (the right side view thereof is identical to the left side view thereof);

FIG. 2 is a front view thereof (the back view thereof is identical to the front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a first perspective view thereof; and,

FIG. 6 is a second perspective view thereof.

The portions of the drawings shown in broken lines represent environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a lighting device, as shown and described. 